import 'dart:async';

import 'package:dio/dio.dart';
import 'package:enjoy_plus/utils/eventbus.dart';
import 'package:flutter/material.dart';

import '../../utils/http.dart';
import '../../utils/toast.dart';
import '../../utils/token.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({super.key});

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final TextEditingController _phoneController = TextEditingController();
  final TextEditingController _codeController = TextEditingController();
  int _countdown = 60;
  bool _isCountdown = false;
  Timer? _timer;
// 获取验证码
  _startCountdown() {
    if (_isCountdown) {
      return;
    }
    setState(() {
      _isCountdown = true;
    });

    _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
      setState(() {
        if (_countdown > 0) {
          _countdown--;
        } else {
          _isCountdown = false;
          _countdown = 60;
          timer.cancel();
        }
      });
    });
  }

// 2. 获取验证码
  void _getVerificationCode() async {
    // 2.1 校验手机号
    if (_phoneController.text.isEmpty) {
      return ToastUtil.showError('请输入手机号码');
    }

    RegExp regExp = RegExp(r'^1[3-9]\d{9}$');
    if (!regExp.hasMatch(_phoneController.text)) {
      return ToastUtil.showError('请输入正确的手机号码');
    }

    // 2.2 调用获取验证码接口
    var res = await http.get('/code', params: {
      'mobile': _phoneController.text,
    });
    if (res['code'] != 10000) return ToastUtil.showError('获取验证码失败');
    ToastUtil.showSuccess('验证码已发送');

    // 延迟执行
    Future.delayed(const Duration(seconds: 2), () {
      _codeController.text = res['data']['code'];
    });

    // 2.3 开始倒计时
    _startCountdown();
  }

  void _submit() async {
    // 3.1 校验手机号
    if (_phoneController.text.isEmpty) {
      return ToastUtil.showError('请输入手机号码');
    }

    RegExp regExp = RegExp(r'^1[3-9]\d{9}$');
    if (!regExp.hasMatch(_phoneController.text)) {
      return ToastUtil.showError('请输入正确的手机号码');
    }

    // 3.2 校验验证码
    if (_codeController.text.isEmpty) {
      return ToastUtil.showError('请输入验证码');
    }
    if (_codeController.text.length != 6) {
      return ToastUtil.showError('请输入6位验证码');
    }
    RegExp regExp2 = RegExp(r'^\d{6}$');
    if (!regExp2.hasMatch(_codeController.text)) {
      return ToastUtil.showError('请输入6位验证码');
    }
    // 3.3 调用登录接口
    var res = await http.post('/login', {
      'mobile': _phoneController.text,
      'code': _codeController.text,
    });
    if (res['code'] != 10000) return ToastUtil.showError('登录失败');

    // 3.4 存储token
    TokenManager().saveToken(res['data']['token']);
    ToastUtil.showSuccess('登录成功');

    // 3.5 返回到上一页
    _timer!.cancel(); // 注意清除定时器
    eventBus.fire(GetUserInfo(''));
    Navigator.pop(context);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        backgroundColor: Colors.white,
        appBar: AppBar(
          title: const Text('登录'),
          backgroundColor: Colors.transparent,
          centerTitle: true,
        ),
        body: Container(
            padding: const EdgeInsets.all(20),
            child:
                Column(mainAxisAlignment: MainAxisAlignment.start, children: [
              const Row(
                children: [
                  Text('登录',
                      style:
                          TextStyle(fontSize: 25, fontWeight: FontWeight.bold))
                ],
              ),
              const SizedBox(height: 10),
              const Row(
                children: [
                  Text('加入享+, 让生活更轻松', style: TextStyle(fontSize: 15))
                ],
              ),
              const SizedBox(height: 30),
              Row(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  Expanded(
                    child: TextField(
                      controller: _phoneController,
                      decoration: const InputDecoration(
                        labelText: '手机号',
                        hintText: '请输入手机号',
                      ),
                    ),
                  ),
                  ElevatedButton(
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.white,
                      shadowColor: Colors.transparent,
                      foregroundColor: const Color.fromARGB(255, 85, 145, 175),
                      minimumSize: const Size(100, 50),
                    ),
                    onPressed: () {
                      _getVerificationCode();
                    },
                    child: Text(_isCountdown ? '$_countdown秒后获取' : '获取验证码'),
                  ),
                ],
              ),
              const SizedBox(height: 8),
              TextField(
                controller: _codeController,
                decoration: const InputDecoration(
                  labelText: '验证码',
                  hintText: '请输入6位验证码',
                ),
              ),
              const SizedBox(height: 8),
              const Row(children: [
                Text('未注册手机号经验证后将自动登录',
                    style: TextStyle(fontSize: 12, color: Colors.grey)),
              ]),
              const SizedBox(height: 50),
              Row(children: [
                Expanded(
                    child: ElevatedButton(
                  style: ElevatedButton.styleFrom(
                    backgroundColor: const Color.fromARGB(255, 85, 145, 175),
                    minimumSize: const Size(100, 50),
                  ),
                  onPressed: () {
                    // 按钮点击
                    _submit();
                  },
                  child: const Text('登录',
                      style: TextStyle(color: Colors.white, fontSize: 20)),
                ))
              ])
            ])));
  }
}
